Continuity mistake: The hotel desk clerk sends Benjamin over to the Singleman party and he speaks to Mr. Singleman and the other people at the door. He turns around to leave and in the next shot the people he was talking to are gone. (00:27:35)
Continuity mistake: Benjamin and his mother have a conversation in the bathroom as he's shaving and he cuts his thumb on the razor. If you look closely the part of his thumb that's cut is nowhere near the razor, only his thumbnail is. (00:45:10)
Continuity mistake: After Benjamin cuts his thumb on the razor he takes it and curls it under his other four fingers. In the next shot his left hand is open wide and the thumb is not bleeding. (00:45:10)
Continuity mistake: Benjamin and Mrs. Robinson have a rendezvous and while they're in bed he tries to get her to talk about her life and her husband. If you look closely at the top of the nightstand to her right there's only a pack of cigarettes and the switch to turn off the lamp. They speak in the dark for a few seconds that she turns the light back on and the nightstand is full of all sorts of other stuff that wasn't there before. (00:46:15)
Continuity mistake: Benjamin and Mrs. Robinson have a rendezvous and while they're in bed in the dark he tries to get her to talk about her life and her husband. If you look closely after she turns the light back on the drapes on the window behind the lamp in the rear of the room have been rearranged without anyone going near them. This happens a couple of times throughout the scene. (00:48:00)
Continuity mistake: Benjamin and Mrs. Robinson have a rendezvous and while they're in bed he gets her to talk about where Elaine was conceived. She turns out the light and the conversation continues a while in the dark until Benjamin indicates that he might take Elaine out on a date. She turns on the light again and gets ready to rip his head off and two drinks appear where there were none before under the lamp on the left of the screen. (00:49:40)
Continuity mistake: After Benjamin and Mrs. Robinson have a fight about Elaine she sits on the side of the bed putting on her stockings as she gets ready to leave. Benjamin says, "Oh no, look I like you" and in the next shot as the camera shifts angles a chair appears in front of Mrs. Robinson that wasn't there before. (00:53:10)
Continuity mistake: In the hotel room Mrs. Robinson makes Benjamin promise that he will never take Elaine out. If you look closely the purple chair in the middle of the room has been moved out about a foot away from the wall so that it's now blocking her line of sight and obscuring the bottom of the lamp that's in front of the window. When we saw this spot before as they were lying in bed the bottom of the lamp could easily be seen from the bed. (00:54:05)
Continuity mistake: Benjamin arrives at the Robinson's for his date with Elaine and he sits on the couch next to Mrs. Robinson to try to explain. Before he sits down the lamp on the left of the couch is off, then in the next shot as he sits down the lamp is on. (00:57:00)
Continuity mistake: Benjamin takes Elaine to the bar at the Taft Hotel. As they leave the bar, both double doors are open as Benjamin walks through but in the next shot we have a different camera angle and only the door on the right is open. (01:04:50)
Continuity mistake: Benjamin brings some flowers for his date with Elaine and has them on the dashboard underneath the rearview mirror. As the scene progresses the box moves to the left in relation to the steering wheel and the rear view mirror above it without being touched. (01:07:45)
Continuity mistake: As Benjamin approaches their house, Mrs. Robinson gets into the car and threatens to tell Elaine about their affair. Benjamin gets out of his car in the pouring rain and runs to the Robinson house and if you look closely he runs out from under the rain making machine about thirty feet from the car. (01:08:50)
Continuity mistake: As Benjamin runs into the Robinson house his feet are soaking wet and they leave several footprints in front of the doorway. When Mrs. Robinson runs in a couple of seconds later the floor is dry. (01:08:55)
Continuity mistake: After sitting in the car talking to Elaine's mother Benjamin runs into the Robinson house and up the steps to Elaine's room. Mrs. Robinson follows a couple seconds later and a statue of a poodle at the bottom of the steps is now facing in the opposite direction. (01:08:55)
Continuity mistake: Mrs. Robinson runs into the house after Benjamin and the chair and plant at the bottom of the steps on the left of the screen have been moved without anyone being near them. (01:09:05)
Continuity mistake: Benjamin follows Elaine and meets up with her on a bus as she's going to the zoo to meet her boyfriend. After Elaine and her boyfriend walk off and leave Benjamin alone he looks over at two monkeys sitting in their cage. The first time we see them they're sitting next to a window, but in the next shot of them we're looking at two different monkeys that are not sitting next to a window. (01:20:25)
Continuity mistake: Benjamin runs into his apartment building and up the steps holding the flowers towards the floor. In the next shot he's holding the flowers upward. (01:30:25)
Continuity mistake: Benjamin runs up the steps to his apartment to find Mr. Robinson sitting there waiting for him. Before he gets to the door the wall on his right is dark but then in the next shot as we see him entering the apartment that wall is totally lit up. (01:30:35)
Continuity mistake: Benjamin walks into his apartment and Mr. Robinson is sitting there waiting for him and his face and the back of his head are totally dark. In the next shot we see his face again and the left side is lit up. (01:30:50)
Continuity mistake: Mr. Robinson sits in Benjamin's apartment waiting for him by the window as he smokes a cigar. In the first shot of this scene the cigar is lit, he never puts it out but several seconds later we see it again and it isn't. Then in the shot after that we see smoke blowing through the air as we look at Benjamin face. (01:31:30)
